Free Tool to Compare Revit Models And Visualize The Differences

This is a very useful addin coded by Matt Mason during a recent Hackathon. Basically, it lets you take a Snapshot of a Revit file at a point in time and save that info to a small database file. It is not saving pure geometry, but a lightweight set of all the useful information about the model, including parameters. Then, when you get a new file, you run the Compare function to compare that snapshot against the current model. Very cool.